Management of Diabetic Ketoacidosis

Diagnosis and Initial Assessment

• The American Diabetes Association recommends initial laboratory evaluation should include plasma glucose, blood urea nitrogen, creatinine, serum ketones, electrolytes with calculated anion gap, osmolality, urinalysis, arterial blood gases, complete blood count with differential, and electrocardiogram 1
• Continuous cardiac monitoring is crucial in severe DKA to detect arrhythmias early, as recommended by the American Heart Association 2

Fluid Therapy

• The American College of Emergency Physicians recommends beginning with balanced electrolyte solutions rather than 0.9% saline at a rate of 15-20 mL/kg/h during the first hour to restore circulatory volume and tissue perfusion 3
• Continue fluid replacement to correct estimated deficits within the first 24 hours, with an induced change in serum osmolality not exceeding 3 mOsm/kg/h, as suggested by the American College of Emergency Physicians 3

Insulin Therapy

• The American Diabetes Association recommends administering an intravenous bolus of regular insulin at 0.15 U/kg body weight, followed by a continuous infusion at 0.1 U/kg/h 3
• If plasma glucose does not fall by 50 mg/dL from the initial value in the first hour, double the insulin infusion every hour until a steady glucose decline between 50-75 mg/h is achieved, as recommended by the American Association of Clinical Endocrinologists 3
• Transition from intravenous to subcutaneous insulin requires administration of basal insulin 2-4 h before the intravenous insulin is stopped to prevent recurrence of ketoacidosis and rebound hyperglycemia, as suggested by the American Diabetes Association 1

Electrolyte Management

• The American College of Emergency Physicians recommends monitoring potassium levels closely as total body potassium deficits are common despite potentially normal or elevated initial serum levels due to acidosis 3
• Once renal function is assured and serum potassium is known, add 20-40 mEq/L potassium to the infusion when serum levels fall below 5.5 mEq/L, as recommended by the American Heart Association 2
• The use of bicarbonate in people with DKA made no difference in the resolution of acidosis or time to discharge, and its use is generally not recommended, according to the American Diabetes Association 1

Monitoring and Ongoing Management

• The American College of Emergency Physicians recommends monitoring fluid input/output, hemodynamic parameters, and clinical examination to assess progress with fluid replacement 3
• Monitor blood glucose at least every 2-4 hours while the patient takes nothing by mouth, as suggested by the American Diabetes Association 1
• Target blood glucose levels of 100-180 mg/dL, as recommended by the American Diabetes Association 1
• Carefully monitor for complications, particularly electrolyte imbalances that can trigger cardiac arrhythmias, according to the American Heart Association 2

Identification and Treatment of Precipitating Causes

• Obtain bacterial cultures of urine, blood, and other sites as needed and administer appropriate antibiotics if infection is suspected, as recommended by the Infectious Diseases Society of America 3
• SGLT2 inhibitors should be discontinued 3-4 days before surgery to prevent DKA, according to the American Diabetes Association 1

Discharge Planning and Prevention

• A structured discharge plan should be tailored to the individual to reduce length of hospital stay and readmission rates, as recommended by the American College of Emergency Physicians 1
• Include education on the recognition, prevention, and management of DKA for all individuals affected by or at high risk for these events to prevent recurrence and readmission, according to the American Diabetes Association 1

Diabetic Ketoacidosis Management

Diagnosis and Monitoring

• Direct measurement of β-hydroxybutyrate in blood is the preferred method for monitoring DKA, as the nitroprusside method only measures acetoacetic acid and acetone, according to the American Diabetes Association 4
• Draw blood every 2-4 hours to determine serum electrolytes, glucose, blood urea nitrogen, creatinine, osmolality, and venous pH, as recommended by the American Diabetes Association 4

Electrolyte Management

• Bicarbonate therapy is generally not recommended in DKA patients with pH >7.0, as studies have failed to show beneficial effects on clinical outcomes, as stated by the American Diabetes Association 4
• Consider phosphate replacement only in patients with cardiac dysfunction, anemia, respiratory depression, or serum phosphate <1.0 mg/dL, according to the American Diabetes Association 4

Resolution Parameters

• DKA resolution requires glucose <200 mg/dL, serum bicarbonate ≥18 mEq/L, venous pH >7.3, and anion gap ≤12 mEq/L, as defined by the American Diabetes Association 4

Diabetic Ketoacidosis Treatment Guidelines

Fluid Therapy

• For mild DKA, 1.5 times the 24-hour maintenance requirements (5 mL/kg/h) will accomplish smooth rehydration; do not exceed twice the maintenance requirement, as recommended by the American Diabetes Association 5

Insulin Therapy

• For mild DKA, subcutaneous regular insulin may be given every 4 hours (5-unit increments for every 50 mg/dL increase in blood glucose above 150 mg/dL, up to 20 units for blood glucose of 300 mg/dL), according to the American Diabetes Association 5

Electrolyte Management

• Begin potassium replacement after serum levels fall below 5.5 mEq/L, assuming adequate urine output, as suggested by the American Diabetes Association 6
• Add 20-30 mEq potassium (2/3 KCl and 1/3 KPO4) in each liter of infusion fluid to maintain serum potassium concentration within 4-5 mEq/L, as recommended by the American Diabetes Association 6
• If significant hypokalemia is present initially, delay insulin treatment until potassium concentration is restored to >3.3 mEq/L to avoid arrhythmias, cardiac arrest, and respiratory muscle weakness, according to the American Diabetes Association 6

Bicarbonate Therapy

• For adult patients with pH <6.9, administer 100 mmol sodium bicarbonate in 400 mL sterile water at 200 mL/h, as recommended by the American Diabetes Association 6
• For patients with pH 6.9-7.0, administer 50 mmol sodium bicarbonate in 200 mL sterile water at 200 mL/h, according to the American Diabetes Association 6

Phosphate Replacement

• Studies have failed to show beneficial effects of routine phosphate replacement on clinical outcomes in DKA, as reported by the American Diabetes Association 5, 6

Monitoring and Resolution Parameters

• Venous pH (typically 0.03 units lower than arterial pH) and anion gap can be followed to monitor resolution of acidosis, as suggested by the American Diabetes Association 5

Transition from IV to Subcutaneous Insulin

• When DKA is resolved and the patient can eat, transition to a multiple-dose regimen using a combination of short/rapid-acting and intermediate/long-acting insulin, as recommended by the American Diabetes Association 5
• For newly diagnosed patients, initiate a multidose regimen of short- and intermediate/long-acting insulin at approximately 0.5-1.0 units/kg/day, according to the American Diabetes Association 6

Prevention of Complications

• Cerebral edema is a rare but frequently fatal complication of DKA, occurring in 0.7-1.0% of children with DKA, as reported by the American Diabetes Association 6
• To prevent cerebral edema, follow recommendations for gradual correction of glucose and osmolality, and judicious use of isotonic or hypotonic saline, as suggested by the American Diabetes Association 5, 6

Management of Diabetic Ketoacidosis (DKA)

Initial Assessment and Treatment

• The American Diabetes Association recommends starting continuous IV regular insulin at 0.1 units/kg/hour without an initial bolus as standard of care for critically ill patients 7
• Some evidence suggests adding low-dose subcutaneous basal insulin analog (e.g., glargine) alongside IV insulin may prevent rebound hyperglycemia and shorten hospital stays, though this is not yet standard practice in all guidelines 7

Identifying and Treating Precipitating Causes

• The American Diabetes Association notes that SGLT2 inhibitors can cause euglycemic DKA—discontinue 3-4 days before surgery 7
• Search for myocardial infarction, stroke, or other acute stressors 7

Resolution Criteria and Transition to Subcutaneous Insulin

• The American Diabetes Association recommends administering basal insulin (intermediate or long-acting) 2-4 hours BEFORE stopping IV insulin to prevent recurrence of ketoacidosis and rebound hyperglycemia 7

Critical Complications to Monitor

• The American Diabetes Association notes that higher BUN at presentation is a risk factor for cerebral edema 7

Special Considerations for Mild DKA

• The American Diabetes Association suggests that for uncomplicated mild DKA, subcutaneous rapid-acting insulin analogs may be used in emergency department or step-down units with aggressive fluid management, which may be safer and more cost-effective than IV insulin 7